The idea of mutations was brought forth by

Options

A. Hardy Weinberg, who worked on allele frequencies in a population
B. Charles Darwin, who observed a wide variety of organisms during sea voyaga
C. Hugo de Vries, who worked on evening primrose
D. Gregor Mendel, who worked on pisumsativum

Answer

To answer the question "The idea of mutations was brought forth by," we need to analyze the options provided and identify the correct individual associated with the concept of mutations.

### Step-by-Step Solution:

1. **Understanding the Concept of Mutation**:
- Mutation refers to random and directionless changes in the genetic material (DNA) of an organism. These changes can lead to variations in traits and can be a source of genetic diversity.

2. **Evaluating the Options**:
- **Option 1: Hardy Weinberg**: Known for his work on allele frequencies in populations and the Hardy-Weinberg equilibrium, which describes genetic variation in a population under certain conditions. He did not propose the idea of mutations.
- **Option 2: Charles Darwin**: Famous for his theory of natural selection, Darwin observed variations in organisms but did not specifically introduce the concept of mutations.
- **Option 3: Hugo de Vries**: He is credited with the concept of mutation and conducted significant research on the evening primrose (Oenothera lamarckiana), where he observed and described mutations.
- **Option 4: Gregor Mendel**: Known as the father of genetics for his experiments with pea plants, Mendel's work laid the foundation for understanding inheritance but did not focus on mutations.

3. **Identifying the Correct Answer**:
- Based on the analysis, the correct answer is **Hugo de Vries**, as he was the one who brought forth the idea of mutations.

### Final Answer:
The idea of mutations was brought forth by **Hugo de Vries**.

---